#pragma once

void print_matrix(double** phi, int n, char* buf);

void print_matrix2(double** phi, double** eta, int n, char* buf);

void print_matrix3(double** phi, double** eta, double **xx, int n, char* buf);

void print_vector(double *x, int n, char* buf);


void Thomas(doubl **a, double *x, double *f, int n);


